Raid System Configuration; Raid - NEC N8100-1422F User Manual

4-22 Configuring Your Server

RAID SYSTEM CONFIGURATION

This section describes how to use the internal hard disk drives as RAID System by Onboard RAID
Controller (LSI Embedded MegaRAID) installed in 3.5-inch disk model or Internal RAID
Controller (N8103-116 or equivalent) installed in 2.5-inch disk model.
About the optional RAID Controller for 3.5-inch disk model (N8103-90/116/117), refer to the
documents provided with optional RAID Controller.

RAID

Overview of RAID System
What is RAID (Redundant Array of Inexpensive Disks)?
RAID is an abbreviation for "Redundant Array of Inexpensive Disks". The RAID technology allows
more than one hard disk drive (HDD) to be handled collectively.
In actual, RAID can configure more than one HDDs as a single array (disk group) to operate the
HDDs effectively. This can bring higher performance than a single HDD of a large capacity.
The Onboard RAID Controller (LSI Embedded MegaRAID) or Internal RAID Controller (N8103-
116 or equivalent) has a feature to divide a single disk group into several logical drives (virtual
disks). The RAID controller recognizes these virtual disks as if it were a single hard disk drive. The
RAID Controller accesses to more than one hard disk drive configuring a disk group in parallel.
Some RAID levels can recover data from remaining data and parity by using rebuild feature if an
error occurs in a single HDD. This can provide high reliability for the system.